thats front fitment done right!
the easiest way mate is to put on stock wheels - work out their offset/width
then work out what size rim you want (8.5,9,9.5,10 etc etc)
and then measure what offset you think you want , and itll tell you how far outside (or inside if you're lame ) the guard the wheel will sit (there are offset calculators - just google that shit)
from here you can work out how much camber to run and what size tyre
also just pming ppl who are running the stance you want and asking what they have is also another good idea
my opinion?
id go 18x9.5 +20 Front, 18x10 +15 Rear
proof:
keeping in mind these guards a rolled a little - however fitment is nice and flush